Sashank Kumar Singh*, D.K. Gupta, R.S. Sidar, S.K. Sinha and Deepika Painkra
Department of Agronomy, RMD College of Agriculture and Reserch Station, Indira Gandhi Krishi Vishwavidyalaya Ambikapur, Surguja-497001 (Chhattisgrah) India
Email: sashankkumarsingh1994@gmail.com
Received-03.09.2021, Revised-15.09.2021, Accepted-24.09.2021
Abstract: A field experiment was conducted during the kharif season 2020-21 at Instructional-cum-Research Farm, Raj Mohini Devi College of Agriculture & Research Station, Ambikapur (C.G.). Soil of the experimental field was sandy loam in texture. To evaluate the “Impact of new herbicides on the productivity of maize” under Northern hill zone of Chhattisgarh to find out the best chemical weed management practices in maize. Eight treatments were evaluated in a randomized block design with three replications. 2 HW at 20 and 40 DAS were recorded lowest weed density, weed fresh & dry weight, weed index and higher weed control efficiency (72.64%) found very effective against complex weed flora and also recorded highest growth parameters, yield attributes viz., no. of cob plant-1, no. of kernel cob-1 and kernel yield (5.98 t ha-1) followed by atrazine 1000 g/ha as PE fb tembotrine 110g/ha as PoE (5.83 t ha-1) and atrazine 1000 g/ha as PE fb topramezone 25 g/ha as PoE (5.67 t ha-1). Highest net returns (Rs.108045 ha-1) was also recorded under 2 HW at 20 and 40 DAS followed by atrazine 1000 g/ha as PE fb tembotrine 110g/ha as PoE (Rs.105487 ha-1) but higher B:C ratio (2.58) was noticed under application of atrazine 1000 g/ha as PE fb tembotrine 110g/ha as PoE followed by atrazine 1000 g/ha as PE fb topramezone 25 g/ha as PoE (2.52) due to lower cost of cultivation as compare to 2 HW at 20 and 40 DAS.
Keywords: Maize, Weed management practices, Atrazine, pre and post emergence herbicides
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